From c80f84e3c037ebaebcec48f59c65be02a6d76a89 Mon Sep 17 00:00:00 2001
From: j_mayer <j_mayer@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Sun, 30 Sep 2007 01:18:26 +0000
Subject: [PATCH] Implement Process Priority Register as defined in the PowerPC
 2.04 spec.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3282 c046a42c-6fe2-441c-8c8c-71466251a162
---
 target-ppc/op.c        |  8 ++++++++
 target-ppc/op_helper.c |  8 ++++++++
 target-ppc/op_helper.h |  3 +++
 target-ppc/translate.c | 20 ++++++++++++++++++++
 4 files changed, 39 insertions(+)

diff --git a/target-ppc/op.c b/target-ppc/op.c
index 46843d790f..fa8477ab9f 100644
--- a/target-ppc/op.c
+++ b/target-ppc/op.c
@@ -295,6 +295,14 @@ void OPPROTO op_store_xer (void)
     RETURN();
 }
 
+#if defined(TARGET_PPC64)
+void OPPROTO op_store_pri (void)
+{
+    do_store_pri(PARAM1);
+    RETURN();
+}
+#endif
+
 #if !defined(CONFIG_USER_ONLY)
 /* Segment registers load and store */
 void OPPROTO op_load_sr (void)
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index 08441caaec..d75331722d 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -112,6 +112,14 @@ void do_store_xer (void)
     xer_bc = (T0 >> XER_BC) & 0x7F;
 }
 
+#if defined(TARGET_PPC64)
+void do_store_pri (int prio)
+{
+    env->spr[SPR_PPR] &= ~0x001C000000000000ULL;
+    env->spr[SPR_PPR] |= ((uint64_t)prio & 0x7) << 50;
+}
+#endif
+
 void do_load_fpscr (void)
 {
     /* The 32 MSB of the target fpr are undefined.
diff --git a/target-ppc/op_helper.h b/target-ppc/op_helper.h
index 6c0d2fbf92..c5b4f2d19b 100644
--- a/target-ppc/op_helper.h
+++ b/target-ppc/op_helper.h
@@ -57,6 +57,9 @@ void do_load_cr (void);
 void do_store_cr (uint32_t mask);
 void do_load_xer (void);
 void do_store_xer (void);
+#if defined(TARGET_PPC64)
+void do_store_pri (int prio);
+#endif
 void do_load_fpscr (void);
 void do_store_fpscr (uint32_t mask);
 target_ulong ppc_load_dump_spr (int sprn);
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index f4ff22e385..08cd92cde7 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -1124,6 +1124,26 @@ GEN_HANDLER(or, 0x1F, 0x1C, 0x0D, 0x00000000, PPC_INTEGER)
     } else if (unlikely(Rc(ctx->opcode) != 0)) {
         gen_op_load_gpr_T0(rs);
         gen_set_Rc0(ctx);
+#if defined(TARGET_PPC64)
+    } else {
+        switch (rs) {
+        case 1:
+            /* Set process priority to low */
+            gen_op_store_pri(2);
+            break;
+        case 6:
+            /* Set process priority to medium-low */
+            gen_op_store_pri(3);
+            break;
+        case 2:
+            /* Set process priority to normal */
+            gen_op_store_pri(4);
+            break;
+        default:
+            /* nop */
+            break;
+        }
+#endif
     }
 }